remove memoryinstrumentation

Source/core/css/CSSBorderImageSliceValue.h

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 29 matching lines @@
     {
         return adoptRef(new CSSBorderImageSliceValue(slices, fill));
     }
 
     String customCssText() const;
 
     Quad* slices() { return m_slices ? m_slices->getQuadValue() : 0; }
 
     bool equals(const CSSBorderImageSliceValue&) const;
 
-    void reportDescendantMemoryUsage(MemoryObjectInfo*) const;
-
     // These four values are used to make "cuts" in the border image. They can be numbers
     // or percentages.
     RefPtr<CSSPrimitiveValue> m_slices;
     bool m_fill;
 
 private:
     CSSBorderImageSliceValue(PassRefPtr<CSSPrimitiveValue> slices, bool fill);
 };
 
 } // namespace WebCore
 
 #endif // CSSBorderImageSliceValue_h